Need manga recommendation.

[Silver Crystal]

I'm looking for a manga like Cage no Eden/Eden no ori where there's a struggle to survive with classmates or something along these lines..
Thanks before ;)

 

[Darkabad]

Well Silver Crystal If you look for a struggle to survive with classmates or something along these lines.. can be a lot there are the famous ones like highschool of dead, corpse party ,Mouryou no Yurikago and from the same author Hoozuki no Shima.If is only survival you can also check 7 seeds , sprite , region ,battle royal.my personal
recommendation is gunjou senki and lets lagoon.I hope this help you.:)